{
  "node": {
    "id": "term:cleanroom",
    "type": "Term",
    "label": "Cleanroom",
    "properties": {
      "id": "cleanroom",
      "name": "Cleanroom",
      "aka": [
        "clean room",
        "ISO 14644"
      ],
      "section": "topic-manufacturing",
      "definition": "A room whose airborne particle count is held to a class by filtered air, overpressure and gowning, graded under ISO 14644-1: ISO class 7 allows at most 352,000 particles of 0.5 µm or larger per cubic metre. It controls particles, whereas a dry room controls moisture; cell assembly usually needs both, because one metal particle can short a cell.",
      "related": [
        "dry-room",
        "metal-particle-contamination",
        "cell-assembly",
        "internal-short-circuit"
      ],
      "url": "https://lemonergy.com/learn/glossary/cleanroom/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:4842",
      "source": "term:cleanroom",
      "target": "topic:topic-manufacturing",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:4843",
      "source": "term:cleanroom",
      "target": "term:dry-room",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4844",
      "source": "term:cleanroom",
      "target": "term:metal-particle-contamination",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4845",
      "source": "term:cleanroom",
      "target": "term:cell-assembly",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:4846",
      "source": "term:cleanroom",
      "target": "term:internal-short-circuit",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "topic:topic-manufacturing",
      "type": "Topic",
      "label": "Manufacturing",
      "properties": {
        "id": "topic-manufacturing",
        "name": "Manufacturing",
        "lede": "The steps that turn powders and foils into a finished cell, in production order.",
        "context": "Place operations and quality checks in process order.",
        "example": "An electrode can meet coating mass targets but fail adhesion or moisture checks later.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-production/",
        "lesson_label": "Open production"
      }
    },
    {
      "id": "term:dry-room",
      "type": "Term",
      "label": "Dry room",
      "properties": {
        "id": "dry-room",
        "name": "Dry room",
        "section": "topic-manufacturing",
        "definition": "A production room whose air is kept extremely dry — dew points around −30 °C to −60 °C — so that no moisture reaches the cell while the electrolyte goes in. Water would react with the salt LiPF₆ to form hydrofluoric acid.",
        "related": [
          "dew-point",
          "vacuum-drying",
          "electrolyte-filling",
          "lithium-salt"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/dry-room/",
        "mentions": [
          "electrolyte",
          "hydrofluoric-acid",
          "lipf6"
        ]
      }
    },
    {
      "id": "term:metal-particle-contamination",
      "type": "Term",
      "label": "Metal particle contamination",
      "properties": {
        "id": "metal-particle-contamination",
        "name": "Metal particle contamination",
        "aka": [
          "metal particle",
          "metallic contamination",
          "foreign particles"
        ],
        "section": "topic-manufacturing",
        "definition": "Stray fragments of iron, copper, zinc or steel from raw materials, worn equipment or cutting. A particle tens of micrometres across can pierce the separator, or dissolve and regrow across it, causing high self-discharge or a latent internal short circuit — the cause of the 2006 laptop battery recalls. Magnetic filters, cleanroom discipline and K-value screening keep them out.",
        "related": [
          "internal-short-circuit",
          "cleanroom",
          "k-value",
          "self-discharge",
          "burr"
        ],
        "url": "https://lemonergy.com/learn/glossary/metal-particle-contamination/",
        "mentions": [
          "separator",
          "short-circuit"
        ]
      }
    },
    {
      "id": "term:cell-assembly",
      "type": "Term",
      "label": "Cell assembly",
      "properties": {
        "id": "cell-assembly",
        "name": "Cell assembly",
        "section": "topic-manufacturing",
        "definition": "The second phase of cell production: building the electrode–separator stack by winding or stacking, welding the tabs, inserting it into the case and filling the electrolyte. Most of it happens in the dry room.",
        "related": [
          "winding",
          "stacking",
          "tab-welding",
          "electrolyte-filling",
          "cell-production"
        ],
        "lesson": "fundamentals/cell-production/#assembly",
        "url": "https://lemonergy.com/learn/glossary/cell-assembly/",
        "mentions": [
          "electrode",
          "separator",
          "electrolyte",
          "dry-room"
        ]
      }
    },
    {
      "id": "term:internal-short-circuit",
      "type": "Term",
      "label": "Internal short circuit",
      "properties": {
        "id": "internal-short-circuit",
        "name": "Internal short circuit",
        "abbr": "ISC",
        "section": "topic-safety",
        "definition": "An unintended electronic path between the electrodes inside a cell — through a metal particle, a burr, a damaged separator or lithium deposits. It discharges the cell internally and turns its energy into local heat.",
        "related": [
          "thermal-runaway",
          "dendrite",
          "separator",
          "external-short-circuit",
          "self-discharge",
          "internal-short-trigger-device"
        ],
        "lesson": "fundamentals/cell-anatomy/#short-circuit",
        "url": "https://lemonergy.com/learn/glossary/internal-short-circuit/",
        "mentions": [
          "electronic-path",
          "burr",
          "metal-particle-contamination"
        ]
      }
    }
  ]
}